Got an eye on this grow now..

LED's have gotten many times brighter over the last few years and now they producing them bright enough to use a single LED for a car headlight.

Luxeon seems to be the best of them last I saw, has anyone looked at some Luxeons and seen if they offer them in different light wavelengths, or more specifically the right light wavelengths?

I might be down for brewing up an array if so.